Improved high and low water detector for steam-boilers



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N. PETERS, PHOTO-LITHDGHAFHER, WASHINGTON D C UNITED STATES PATENTOFFICE.

JAMES P. HILLARD, OF FALL RIVER, MASSACHUSETTS.

IMPROVED HIGH AND LOW WATER DETECTOR FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 34,575, dated March 4,1862.

Toall whom it may concern:

Be it known that I, JAMES P. HILLARD, of

' Fall River, in the county of Bristol and State of Massachusetts, haveinvented a new and Improved Low and High T/Vater Detector for the Safetyof Steam-Boilers; and I do hereby declarethat the following is a fulland exact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

My invention Consists in a valve with two ports, to which is attached anadjusting-arm and oat. I permanently secure a tube in the end, top, orside of a steam-boiler and secure my invention to it on the inside ofthe boiler, and arrange it so that when thewater falls to a certain linethe float, resting on the water and attached to the valve by theadjusting-arm, will open one port and allow the steam to escape and givealarm, and when the water rises to a certain line the float will alsorise and open the other port and give alarm.

My invention may be applied to steamboilers constructed in any oftlieknown forms, with gage-cocks, safety-valves, and other appendagesfor the safety of boilers.

The object of my invention is to give alarm by the escape of steam whenthe water evaporates too low and bythe escape of water when it rises toohigh.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

Figure l isa perspective view of my invention detached from the boiler.Fig. 2 is a perspective view of my invention with the valve removed.Fig. 3 is a vertical section. Fig. 4 is a perspective view of the valveremoved from the detector. Figs. 5 and 6 are sections of steam-boilers,showing the manner of attaching my invention to them.

A is the detector, cast hollow, except the center, through which thestem of the valve a passes.

B is the valve. l

C D are ports through B. 1

J is a rod secured to the opposite end of the valve-stem a. (See Fig.3.)

F is a float secured to J.

A2 is the detector with the valve removed; F2, the front of thedetector, made concave.

G2 is a port through the front.

a2 is a hole through which the stem of the valve is put, (see a2, Fig.3.)

A2 is the inside of the detector; B2, the valve; C2, the front ofdetector; K', a screw to screw it to the tube in the boiler, (see E,Fig. l.)

f3 is a spring around the valve-stem a3, and

springs the valve B3 against the seat of the' detector C2.

g3 is a set-screw and secures J3 to a2.

a4 is the stem of the valve; B4, the valve with its two ports Cl D4,(shown by C D in Fig. 1;) A5, the detector; E5, the iioat; H5, stopcock;15,stcam-whistle; A, detector; ELiioat resting on the water.

Operation: The above invention being constructed as herein specified,and attachedto a steam-boiler, as herein set forth, its operation andnovelty may be noted. When the water evaporates in the boiler to acertain line, the arm attached to the float and resting on the water,the weight of the `Tloat will roll the valve till port C (see Fig. l)comes opposite G2, (see Fig. 2,) when the steam will escape through E(see Fig. l) and sound the whistle I5, (see Fig. 5,) and when the waterrises to a certain 'height the oat will also rise till port C (see Fig.l) comes opposite G2, (see Fig. 2,) when the water will escape and givealarm.

VV'hat I claim as my invention, and desire to secure by Letters Patent,is-

The combination of valve B' with two ports, and detector A with oneport, and adjustingarm J, attach ed to B', and float F', Constructed andarranged substantially as and for the purposes set forth and described.

JAMES P. HILLARD.

T/Vitn esses:

JAMES FORD, WILLIAM D. BUSH.

